I have just had the DPF fluid topped up at Ford and a forced regeneration carried out. No problems with that. However they state there is a further fault showing (and hence the engine malfunction light is still on) that states that the DPF fluid tank needs replacing at a cost of over £500! As the car is running fine and I am not rich I am holding off getting this done. I tried to search for the part on the internet and can't find it at all. Anyone had this replaced before and know if it can sourced at a cheaper price? Many thanks Stephen.